One of the key factors in the human brain’s ability to change via neuroplasticity is that neurons form interconnections based on simultaneous firing over a period of time. According to Norman Doidge, author of The Brain That Changes Itself, this theory was first proposed by none other than Sigmund Freud, but was articulated in more detail by Canadian psychologist Donald Hebb. Doidge attributes this neat summary to neuroscientist Carla Shatz: Neurons that fire together wire together. […]

Just-published research in the Journals of Gerontology: Medical Sciences shows that volunteering and similar social activities are helpful in staving off mental decline in later years, and can actually improve cognition.